Darker Medium applies a customizable dark theme to *all* medium formatted stories. You can customize the header background, main accent color, highlight color and link styles separately from the option menu. No matter the domain, if a site is using Medium, it will get a dark theme; that is the main advantage over Stylus and Stylish.
Alternative products to Top Medium Stories
Top Medium Stories showcases the best stories written on Medium. You can filter the stories by year and the list is updated daily.